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class="pro-prev col-xs-6 col-sm-6 col-md-6 col-lg-6"><img src="/templates/pc_wjdh/img/proLr.png" alt="右"></div> </div> </div> </div> </div> </div> <div class="proListR col-xs-12 col-lg-8-0 "> <div class="newsdetails col-xs-12 col-sm-12 col-md-12 col-lg-12"> <div class="caseCenter"> <div class="caseCmenu"> <h3>污水處理常見基本原理問答</h3> <span class="casemfx"> 所屬分類：行業資訊發布時間： 2020-09-28 作者：admin <div class="bdsharebuttonbox"> <i> 分享到：</i> <a href="#" class="bds_more" data-cmd="more"></a> <a href="#" class="bds_sqq" data-cmd="sqq" title="分享到QQ好友"></a> <a href="#" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a> </div> <a href="#" class="scan" title="二維碼分享">二維碼分享 <div id="qrcode" style="display: none"> </div> </a> </span> </div> <div class="caseContainer"> 1、設置沉砂池的目的是什么？曝氣沉砂池的工作原理與平流式沉砂池有何區別？<br /> 答：沉砂池的設置目的是去除污水中泥砂、煤渣等相對密度較大的無機顆粒，以免影響后續處理構筑物的正常運行。<br /> 沉砂池的工作原理是以重力分離或離心力分離為基礎，<strong>陜西污水處理設備</strong>即控制進入沉砂池的污水流速或旋流速度，使相對密度大的無機顆粒下沉，而有機顆粒則隨水流帶走。<br /> 平流式沉砂池是通過控制進入的污水流速，以重力分離無機顆粒；而曝氣沉砂池是由于曝氣作用，在池的橫斷面上產生旋轉流動，整個池內水流產生螺旋狀前進的流動形式，無機砂粒由于離心力作用而沉入集砂槽中。<br /> 2、氣固比的定義是什么？如何確定適當的氣固比？<br /> <p> 答：氣固比（а）的定義是溶解空氣量<strong style="white-space:normal;"><a href="http://www.picklesexpress.net/" target="_blank">陜西污水處理設備</a></strong>（A）與原水中懸浮固體含量（S）的比值，氣固比選用涉及原水水質、出水要求、設備、動力等因素，對于所處理的廢水好金國氣浮試驗來確定氣固比，無試驗資料時一般取0.005-0.06，廢水中懸浮固體濃度不高時取下限，如選用0.005-0.006；但懸浮固體較高時，可選用上限，如氣浮用語剩余污泥濃縮時氣固比一般采用0.03-0.04。 </p> <p style="text-align:center;"> <img src="http://img.dlwjdh.com/upload/8424/200928/77e440a63a869a81bf5744bab1ff903c.jpg" alt="" /> </p> 3、如何改進及提高沉淀或氣浮分離效果？<br /> 答：通過采取相應的措施，增大懸浮顆粒的直徑，減小流體的黏度等都能提高沉淀或氣浮分離效果。如：通過混凝處理增大顆粒粒徑，提高水溫以減小水的黏度。另外，也可以減小氣泡直徑來提高氣浮分離效果。<br /> 4、生化需氧量、化學需氧量、總有機碳和總需氧量指標的含義是什么？分析這些指標之間的聯系與區別。<br /> 答：生化需氧量（BOD）：水中有機污染物被好氧微生物分解時所需的氧量稱為生化需氧量。<br /> 化學需氧量（COD）：在酸性條件下，用強氧化劑將有機物氧化為CO2、H2O所消耗的氧量。<br /> 總有機碳（TOC）：水樣中所有有機污染物的含碳量。<br /> 總需氧量（TOD）：有機物除碳外，還含有氫、氮、硫等元素，<strong style="white-space:normal;">陜西污水處理設備</strong>當有機物全都被氧化時，碳被氧化為二氧化碳，氫、氮及硫則被氧化為水、一氧化氮、二氧化硫等，此時需氧量稱為總需氧量。<br /> 這些指標都是用來評價水樣中有機污染物的參數。生化需氧量間接反映了水中可生物降解的有機物量?；瘜W需氧量不能表示可被微生物氧化的有機物量，此外廢水中的還原性無機物也能消耗部分氧?？傆袡C碳和總需氧量的測定都是燃燒化學法，前者測定以碳表示，后者以氧表示。TOC、TOD的耗氧過程與BOD 的耗氧過程有本質不同，而且由于各種水樣中有機物質的成分不同，生化過程差別也大。各種水質之間TOC或TOD與BOD不存在固定關系。在水質條件基本相同的條件下，BOD與TOD或TOC之間存在一定的相關關系。<br /> </div> <div class="caseTab"> <ul> <li class="col-xs-6 col-sm-6 col-md-6"> <a href="/yyxw/973672.html">環境影響評價制度的作用是什么？</a> </li> <li class="col-xs-6 col-sm-6 col-md-6"> <a href="/yyxw/946031.html">環?？⒐を炇盏淖⒁馐马?/a> </li> </ul> </div> </div> </div> </div> </div> </div> </div> <script src="/templates/pc_wjdh/js/n/jquery.min.js"></script> <script src="/templates/pc_wjdh/js/n/bootstrap.min.js"></script> <script src="/templates/pc_wjdh/js/n/swiper-3.4.2.min.js"></script> <script src="/templates/pc_wjdh/js/n/rem.min.js"></script> <script src="/templates/pc_wjdh/js/n/qrcode.js"></script> <script src="/templates/pc_wjdh/js/menu_sub.js"></script> 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